HC4900 System Service Manual Cover- Skyazul service manual is designed to assist a service or...

SIGALARM

MODEL 210

HC4900

SERVICE MANUAL

Service Manual – HC4900 System

SkyAzúl, Equipment Solutions www.skyazul.com 301-371-6126

NOTICE

SkyAzúl makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and/or its fitness for a particular purpose.

SkyAzúl will not be liable for errors contained in this manual or for incidental or consequential damages in connection with the furnishing, performance, or use of this manual. This document contains proprietary information, which is protected by copyright, and all rights are reserved.

No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of SkyAzúl.

SkyAzúl reserves proprietary rights to all drawings, photos and the data contained therein. The drawings, photos and data are confidential and cannot be used or reproduced without the written consent of Hirschmann. The drawings and/or photos are subject to technical modification without prior notice.

All information in this document is subject to change without notice.

MANUAL REVISIONS

REV DATE NAME DESCRIPTION

- 08/09/13 SC HC4900 System Service Manual (SkyAzúl)

SkyAzúl, Inc. 16 Walnut Street Middletown, MD 21769 Fax 301-371-0029 [email protected]



CONTENTS

1 Warning ..................................................................................................................................... 1

2 System Description.................................................................................................................. 2

2.1 System Function......................................................................................................... 2

2.2 Description of a CAN Bus System ............................................................................ 2

3 System Structure...................................................................................................................... 3

3.1 HC4900 Central Unit ................................................................................................... 4

3.1.1 Performance Parameters of the Central Unit .................................................... 4

3.1.2 Port Configuration of the Central Unit ............................................................... 4

3.1.3 Port Configuration for the Application on the XCMG Telescopic Crane ........ 6

3.1.4 Power and Ground Port....................................................................................... 7

3.1.5 Relay Port ............................................................................................................. 7

3.2 CAN Junction Box ...................................................................................................... 7

3.3 IC4600 Console ........................................................................................................... 8

3.3.1 IC4600 Console Specification............................................................................. 8

3.3.2 Console Layout ................................................................................................... .9

3.3.3 Function Operation............................................................................................ 10

3.3.4 Angle Limit ......................................................................................................... 10

3.3.5 CAN Bus state .................................................................................................... 11

3.3.6 OM code inquire................................................................................................. 12

3.3.7 OM code setting................................................................................................. 12

3.3.8 Reeving setting .................................................................................................. 13

3.3.9 Fault Help............................................................................................................ 13

3.3.10 Horn off ............................................................................................................... 14

3.3.11 A2B indicating light ........................................................................................... 14

3.3.12 Pre-warning light................................................................................................ 14

3.3.13 Overload warning light ...................................................................................... 14

3.4 Pressure transducer................................................................................................. 15

3.5 Length and angle sensor ......................................................................................... 15

3.6 Length sensor ........................................................................................................... 16

3.7 A2B switch ................................................................................................................ 16

3.8 Wind speed................................................................................................................ 16

4 Trouble shooting .................................................................................................................... 17

4.1 Length Sensing......................................................................................................... 17

4.2 Angle Sensing........................................................................................................... 22

4.3 CAN conversion board............................................................................................. 25


4.5 Length sensor (LG105/11.5)..................................................................................... 26


4.6 A2B switch ................................................................................................................ 26

4.7 Wind speed................................................................................................................ 28

4.8 No console display ................................................................................................... 30

4.9 No power in central unit........................................................................................... 31

4.10 CAN BUS Communication ....................................................................................... 32

4.10.1 E61 ..................................................................................................................... .33

4.10.2 E62 ...................................................................................................................... 33

4.10.3 E63 ...................................................................................................................... 33

4.10.4 E64 ...................................................................................................................... 33

4.10.5 E94 ...................................................................................................................... 35

5 System Communication Cable............................................................................................. .36

5.1 The communication cable of console..................................................................... 36

5.2 The pressure transducer cable ............................................................................... 37

5.3 The length/angle sensor cable ................................................................................ 37

6 Drawings ................................................................................................................................. 38

6.1 System topology diagram........................................................................................ 38

6.2 Central unit to crane wiring diagram ...................................................................... 39

6.2.1 Earlier version.................................................................................................... 39

6.2.2 The latest version .............................................................................................. 40

6.3 Central unit to CAN junction box wiring diagram.................................................. 41

6.4 CAN junction box to other sensors wiring diagram.............................................. 42

6.5 Cable reel wiring diagram........................................................................................ 43

7 Spare part listings .................................................................................................................. 44

7.1 Central unit, HC4900 part no. 01490000100............................................................ 44

7.2 CAN junction box, part no. 04494600100............................................................... .45

7.3 IC4600 display, part no. 02460000200 ..................................................................... 46

7.4 Length/Angle sensor, part no. 03520802000 .......................................................... 47

7.5 Length sensor (LG105), part no. 03510500300....................................................... 48

7.6 System cables........................................................................................................... 49


8 Basic Adjustment for Sensors................................................................................................ .51

8.1 Set Zero Point of length sensor ............................................................................... 51

8.2 Set Zero Point of Angle sensor ................................................................................ 51

9 Error code ............................................................................................................................... 52

10 Troubleshooting Moisture ..................................................................................................... 57

10.1 Water Ingress ............................................................................................................ 57

10.2 Condensation............................................................................................................ 58


1

This service manual is designed to assist a service or maintenance person in identifying system

problems or malfunctions. A digital voltmeter with the capability to measure current will be required,

along with standard maintenance and service tools.

NOTE: Knowledge of how to use a voltmeter to measure both voltage and current is assumed.

1 WARNING

The LMI is an operational aid that warns a crane operator of approaching overload conditions and over

hoist conditions that could cause damage to equipment and personnel.

The device is not, and shall not be, a substitute for good operator judgment, experience and use of

accepted safe crane operating procedures.

The responsibility for the safe crane operation shall remain with the crane operator who shall ensure

that all warnings and instructions supplied are fully understood and observed.

Prior to operating the crane, the operator must carefully and thoroughly read and understand the

information in this manual to ensure that he knows the operation and limitations of both the indicator

and the crane.

Proper functioning depends upon proper daily inspection and observance of the operating instructions

set forth in this manual. Refer to Section 6. Pre-Operation Inspection and Calibration Verification of the

operator’s manual.

The manufacturer reserves the right to modify the contents of this manual without notice.

SkyAzul will not be liable for errors contained in this manual or for incidental or consequential

damages in connection with the furnishing, performance, or use of this manual. This document

contains proprietary information, which is protected by copyright, and all rights are reserved.

No part of this document may be photocopied, reproduced, or translated to another language

without the prior written consent of SkyAzul.

SkyAzul reserves proprietary rights to all drawings, photos, and the data contained therein.

The drawings, photos, and data are confidential and cannot be used or reproduced without the

written consent of SkyAzul. The drawings and/or photos are subject to technical modification

without prior notice.

All information in this document is subject to change without notice.


2

The LMI will only work correctly if all adjustments have been properly set. For correct adjustment, the

operator has to correctly answer all of the questions during the setup procedure in accordance with the

current configuration of the crane. To prevent material damage and serious or even fatal accidents, the

correct adjustment of the LMI has to be ensured before starting the crane operation.

2 SYSTEM DESCRIPTION

2.1 SYSTEM FUNCTION

The HC4900 system is a CAN Bus system made up of a central microprocessor unit, operating console,

length/angle sensor, pressure transducers, and anti-two block switches. All components and sensors

are equipped with CAN Bus controllers.

The Load Moment Indicator system operates on the principle of reference/real comparison. The real

value, resulting from the pressure measurement, is compared with the reference data which is stored in

the central processor memory and is evaluated in the microprocessor. When limits are reached, an

overload warning signal is generated through the operator’s console. At the same time, crane functions,

such as hoist up, telescope out and boom down, will be stopped.

The fixed data regarding the crane, such as capacity charts, boom weights, centers of gravity, and

dimensions, are stored in memory chips in the central processing unit. This data is the reference

information used to calculate the operating conditions.

Boom length and boom angle are registered by the length/angle sensor and are mounted inside the

cable reel, which is mounted on the boom. The boom length is measured by cable installed on a cable

reel which also serves as an electrical conductor for the anti two-block switches.

The load is measured by pressure transducers attached to the piston and rod side of the lift cylinders.

The interactive setup procedure simplifies the input of the operating modes as well as the setting of

geometry limits.

2.2 DESCRIPTION OF A CAN BUS SYSTEM

CAN stands for “Controller Area Network”. It is intended for use as a serial bus system for a network of

controllers. Each controller, connected through a CAN chip, is called a "node" and is mostly used to

acquire data from a sensor. All nodes are connected to a common bus and all nodes are able to

simultaneously read the data on that bus. Also, all nodes are able to transmit data on that bus. However,

only one node at a given time has write access to the bus. If the message is relevant, it will be

processed; otherwise it is ignored. The unique identifier also determines the priority of the message.


3

5 2

The lower the numerical value of the identifier, the higher the priority.

The cable bus is a twisted pair of shielded wire. Data can be transmitted in blocks from 0-8 bytes at a

maximum transfer rate of 1 Mbit/s for networks up to 40 meters. For longer network distances, the

maximum transfer rate must be reduced to 50 Kbit/s for a 1 km network distance. CAN will operate in

extremely harsh environments and the extensive error checking mechanisms ensure that any

transmission errors are detected.

3 SYSTEM STRUCTURE

1. HC4900 Central Unit

2. CAN Junction-Box

3. HC4600 Console

4. Pressure Transducers

5. Length and Angle Sensors

6. Length Sensor

7. A2B

8. Wind Speed

3

4

6

1 7

8


4

3.1 HC4900 CENTRAL UNIT

3.1.1 Performance parameters of the central unit

1. Voltage supply：10~30 V DC

2. Digital input：4 circuits（0~30V , could be used as calculator）

3. PWM output：4 circuits（50-400 Hz, 2 A, current control or calibrated by digital output port)

4. I/O port (configured)：4 circuits I/O

5. Housing：Aluminum metal board

6. System connector：M23×1, 19 poles socket

7. Protection grade：IP66

8. Dimension：181 × 141 × 70.5 mm (L × B × H)

9. Working temperature：-30 °C to + 70 °C

10. Storage temperature：-40 °C to + 80 °C

11. CAN communication protocol：CANopen2.0B

12. CAN connector：M12×1, 5 poles socket

13. Relay：2 circuits (max. 4 A)

14. Calibration port：RS 232

15. Processer ：Motorola MPC 561, 40 MHz, 32bit, FPU

16. SRAM：2M

17. Flash-EPRAM：4M

3.1.2 Port configuration of the central unit

The HC 4900 central unit (also called mentor) is the CAN master of the system that is in charge of

controlling the other nodes. It has the function of LMI calculation, port configuration; management, and

control of CAN Bus and so on.

The HC4900 (mentor) safe load

moment indicator includes a

central microprocessor unit. The

system components are

connected via CAN Bus.

Software Upload Port

19 pin port

CAN Bus communication port


5

The HC 4900 central unit has nineteen ports. The specific configuration for each is as follows：

Port SN Port Function Port SN Port Function Port SN Port Function

1 DIN0 8 PWMOUT0/DOUT0 15 K1_MK

2 DIN1 9 PWMOUT1/DOUT1 16 K1_AK

3 DIN2 10 PWMOUT2/DOUT2 17 K2_MK

4 DIN3 11 PWMOUT3/DOUT3 18 K2_AK

5 DIN4/DOUT4 12 GND 19 UBS

6 UBP 13 DIN6/DOUT6

7 DIN5/DOUT5 14 DIN7/DOUT7


6

3.1.3 Port configuration for the application on the XCMG telescopic crane

Port SN Wire Color Port Function Application

1 green DIN0 Front and rear

2 orange DIN1 Half and full extended outrigger

3 white DIN2 Override input

4 white-red DIN3 Boom telescope out signal input

5 Blue DIN4/DOUT4 Boom telescope in signal input

6 brown UBP 24V

7 purple DIN5/DOUT5 Free-slew signal input(only when use iflexc3)

8 white-orange PWMOUT0/DOUT0 red warning light output

9 white-yellow PWMOUT1/DOUT1 yellow warning light output

10 white-green PWMOUT2/DOUT2 green warning light output

11 white-blue PWMOUT3/DOUT3 Boom telescope control signal

12 yellow GND GND

13 black DIN6/DOUT6 Luffing lamp

14 grey DIN7/DOUT7 Telescope lamp

15 white-purple K1_MK 24V

16 white-black K1_AK Overload output

17 white-brown K2_MK 24V

18 black-red K2_AK Free-slew valve signal

19 Red UBS 24V


7

3.1.4 Power and Ground Port

UBS: 24V power supply (power on first before system power on)

UBP: 24V power supply

GND: system ground

3.1.5 Relay Port

There are two relay K1\K2 for extended usage on the

mentor main board.

K1_MK: public port of relay 1 (COM)，could be

connected with 24V voltage or ground

K1_AK: usual port of relay 1 (NO)

K2_MK: public port of relay 2 (COM)，could be

connected with 24V voltage or ground

K2_AK: usual port of relay 2 (NO)

3.2 CAN JUNCTION BOX

The CAN Bus junction box contains a CAN patch

board with five sockets which can be connected with

five different CAN nodes.

The CAN Bus junction box is a CAN Bus

communication net collecting all signals of CAN

equipment in the system.


8

3.3 IC4600 CONSOLE

The IC4600 graphic console displays all geometrical information such as

length and angle of main boom, working radius, and tip height of the

boom. It also displays the actual load and the maximum load permitted

by the crane’s load chart. It also has an alarm, a warning light for

overload, and a pre-warning light. The graphic display allows for a

simple interactive configuration setup, as well as sensor calibration (zero

adjustment), and troubleshooting sensor output screen. The console has

a warning light for anti-two-block conditions and an override switch for

overload or anti-block condition.

3.3.1 IC4600 Console Specification

Type In-dash

Housing sheet metal

Protection class front Back

IP65 IP20

Supply Voltage 11…36 VDC

Processor 16-bit C167CS @20MHz

Program memory 2MB FLASH 1MB RAM

Data memory 16Kb FRAM Serial Memory

Real time clock ·

Watchdog ·

Cut-off Relay

Indicator & buzzer 3 LEDs and 1 buzzer

Digital Input

PWM Output

Digital Output

Dimensions(in mm) front plate (W×H) cut-out/depth (W×H×D)

160×230 mm 136×210×68 mm

Display pixel Size Color

QVGA(320×240) 5.7 inch256 colors

LED backlight

Serial interface CANopen 2.0B

RS232 Operating temperature -20…+70ºC

Storage temperature -35…+80ºC

CoDeSys compatible ·


9

3.3.2 Console Layout

Warning light：

A. A2B warning light

B. Pre-warning light

C. Alarm light

The parameters of the main interface：

1. Bar graph and Percent

2. Operating Mode Code

3. Boom Tip Height

4. Main Boom Angle

5. Working Radius

6. Actual Load

7. Reeving (Parts of Line)

8. Main Boom Length

9. Rated Load

10. List and Trim

11. Counter Weight

12. Wind Speed

13. Outrigger Status (1/2 is half，2/2 is full）

14. Current Time

Function key：

15. Function Interface

16. Set Operating Mode

17. Set Reeving (Parts of Line)

18. Error Codes

19. Horn Off

20. Digital Number Keys

14

15

16

17

18

19

20

7

8

9

1

2

3

4

5

6

12 13 11 10

B C A


10

3.3.3 Function Operation

On the main interface, press the key that corresponds to

the icon . Go to the Function set interface. In this

interface, you can do the following operations:

Set language (Chinese and English)

Units converted between Metric and Imperial

Set the maximum angle limit

Set the minimum angle limit

Set Time and Date

CAN Bus State checking

Operating Mode code explanation (Helper)

Cancel Angle Limit

3.3.4 ANGLE LIMIT

3.3.4 Angle Limit

Boom angle limits can be set through the LMI to warn the operator to use extreme caution under

dangerous conditions such as working in the vicinity of buildings, bridges, high-voltage wire, etc.

Maximum angle limit

Depending on the situation,raise the main boom to the maximum safe angle, press key , the

indicator area will display the angle, the LMI will record this angle as the maximum limit. When the

angle is higher than the limit value, the STOP

indication light will appear and an audible alarm will

sound to warn the operator to take extreme caution.

Minimum angle limit

Depending on the situation, lower the main boom to the minimum safe angle，press key . The

indicator area will display the angle, the LMI will record this angle as the minimum limit. When the angle

The limit function provides warning only (no function lockout). Each time the LMI system is

reset the limit value also must be reset.

ATTENTION


11

is lower than the limit value, the STOP

indication light will appear and an audible alarm will sound to

warn the operator to take extreme caution.

Cancel angle limitation Press the number “4” to cancel the set value in the function

setting interface.

Setting the Time and Date

Press the key and to choose the item you want to

set. When the item is chosen, the background color will

change from green to blue. Then input the current date or

time by pressing the corresponding number. If the value

you input is correct, press

to confirm. If the value is incorrect, press to set

the value to zero and try again. Press to leave this

interface.

3.3.5 CAN Bus state

IC4600 display incorporates the advanced CAN

communication technology and monitors the status of every

node. If a node has a communication error, the error node

is determined through the interface of CAN Bus status

checking.

The node’s working state is distinguished by different

colors:

Green: Operational

Yellow: Pre-Operational

Red: Error or does not exist


12

3.3.6 OM code inquire

3.3.7 OM code setting

Before operating the crane, make sure the current Operating

Mode is correct. If the value is incorrect, set the Operating Mode

to be the same as the actual one.

Go to the Operating Mode Set interface by pressing in the

main LMI interface.

In order to input the correct Operating Mode code, press the

corresponding number. If the value is correct press to

confirm. If the value is incorrect, press to set the value to

zero and try again. Press to leave this interface.


13

3.3.8 Reeving setting

The reeving setting interface is used for setting the parts of line.

Before operation, the operator should adjust the displayed value

to the same value as the actual one.

The relation of displayed reeving and actual reeving is one-to-one

as follows.

Console display：1——12

Number of steel cable ：1——12

Go to the Reeving Set interface by pressing in the main

LMI interface.

Input the right Operating Mode code to what you want by

pressing the corresponding number. If the value is correct, press

to confirm. If the value is incorrect, press to set the value

to zero and try again. Press to leave this interface.

3.3.9 Fault Help

Press the button on the main LMI interface to enter

into the error interface help. This interface will explain what

the error code means and offer a solution for maintenance

and usage.

Press the button and for checking an error

code and press the button to return back to the main

interface.


14

3.3.10 Horn off

The IC4600 console will sound an audible alarm warning if one of the following situations occur：

—— Exceeds the max. Rated load moment

—— Hook is close to the height limit

—— Exceeds the working range

—— LMI system error

—— Wrong operation

Press the button on the interface to stop the audible alarm warning sound for 30 seconds.

3.3.11 A2B indicating light

This red warning light lights up when the hoist limit switch contacts open, i.e. when a hoist limit situation

has occurred. The acoustic alarm sounds and load-moment-increasing crane movements are

switched off at the same time.

A hoist limit situation occurs when the hook block comes into contact with the boom head. The danger

exists in such situations that the hoist rope will break, causing the load to fall. A hoist limit situation could

arise from the load being pulled against the boom head or from the boom being extended or lowered

without the hoist rope being spooled off the winch.

3.3.12 Pre-warning light

When the actual load moment has reached 90%～100% of the rated load moment, the yellow

pre-warning light will appear on the operator’s console. This means an overload situation is

approaching and the operator shall proceed with caution.

3.3.13 Overload warning light

This red display light lights up to indicate that the maximum capacity has been reached or exceeded.

At the same time, the acoustic alarm sounds an uninterrupted signal and, depending on the system

wiring, load moment-increasing boom movements are stopped.

STOP


15

3.4 PRESSURE TRANSDUCER

The pressure transducer converts hydraulic pressure

into an electric signal. Every pressure transducer has

its own CAN Bus converter board, and it has its own

device Node-ID. The piston oil pressure transducer

is connected to the piston side of the lift cylinder, its

Node-ID is 0x3C; The rod oil pressure transducer is

connected to the rod side of the lift cylinder, its

Node-ID id 0x3D.

There are five pins on the transducer:

1 2 3 4 5

PE（shield）＋UB 0V CAN_H CAN_L

The default baudrate is 125K.

3.5 LENGTH AND ANGLE SENSOR

The Length-Angle Transducer: The length-angle

sensor (LWG), often referred to as the “cable reel”, is

a combination of two transducers in one unit. It is

installed on the base section of the boom and

measures the length and the angle of the boom.

A reeling drum drives a potentiometer, which is the

length transducer. Part of the length transducer

circuit is the length cable on the drum, which is a

multi-conductor cable. It is connected to the

anti-two-block switch at the boom tip and to a slip

ring in the LWG, and is also connected to the CAN

conversion board, which is connected to the Bus

system.

The angle transducer is a potentiometer driven by a

weighted pendulum that is oil dampened. Both length

and angle transducer are connected to a CAN Bus

conversion board, which is connected to the Bus

system.


16

3.6 LENGTH SENSOR

The length sensor (LG105), also known as a “cable

reel”, the reeling drum drives a potentiometer, which

is the length transducer.

We are using current signal length sensor, 4-20mA,

when it is connected in a whole CAN BUS system, it

should be converted to CAN signal by the CAN

conversion board inside the length and angle sensor

(the big cable reel).

3.7 A2B SWITCH

Anti-Two-Block Switch: The anti-two-block switch

monitors the hook block and its relationship with the

head of the boom. In working condition the switch is

closed. When the load block strikes the weight, the

circuit opens, disengaging a relay output to the lock

out solenoid valves, where applicable. To check the

cable for damage (short circuit to ground), there is a

4.7k resistor between ground and the contact of the

switch, to give a signal back to the central unit. The

weight at the anti-two-block switch keeps the switch

closed until the load block strikes it.

3.8 WIND SPEED

The wind speed sensor (anemometer) is used to

measure the speed of the wind. It converts the wind

into an electric signal. The HC4900 system supports

current and voltage signal wind speed sensors.


17

4 TROUBLE SHOOTING

4.1 LENGTH SENSING

The system measures the length of the main boom of the machine with a length sensor. The length

sensor is contained within the cable reel, located on the left side of the main boom.

Block Diagram

The signal runs from the length sensor to the CAN Bus converter board, both located in the cable reel.

From there, it travels as digital information on the CAN Bus to the CAN junction box，This acts as the

main CAN Bus running to the central unit.

CAN junction-box

HC4900

CU

Length Sensor

CAN Bus Converter


18

Troubleshooting length read-out:

CAN Bus electronics in cable reel.

The length sensor has a built in potentiometer that is driven by a gear drive from the cable drum. As the

length changes, the cable drum will turn and with it the potentiometer’s axle. The converter board

supplies a voltage of about 4.7V to the length potentiometer and in return monitors the output voltage of

the potentiometer. The terminal used is X20. The length sensor is connected as follows:

Terminal X20

1 + 4.71V

2 Signal

3 + 0.29V

The length potentiometer is 10K and 10 rings and it has three pins. The resistance between pin1 and

pin3 is constant and equal to 10K. The resistance between pin1 and pin2 from 0 to 10K, and the

resistance between pin2 and pin3 from 10K to 0.

X20 (length)

X1 (CAN)


19

To troubleshoot the Length channel, perform one of the following options:

Option 1:


20

Option 2:


21

The length sensor returns a voltage between 0.29V at 0 turns of the length pot (= fully retracted) and

4.71V at 10 turns. The number of turns at full extension will depend on the gear ratio, the boom length,

the length cable used, and the spooling pattern. Due to these variables, we cannot provide a standard

table for it.

We can provide the following trouble-shooting table that shows the expected output voltage (measured

between X20-2 and X20-3 Signal) for each complete turn of the length potentiometer.

Length Sensor Signal on Pin 3

Turns Resistance value

between pin1 and pin2Voltage X20-2 to X20-3 Voltage X20-2 to GND

0 0 0 0.29

1 1K 0.44 0.73

2 2K 0.88 1.17

3 3K 1.33 1.62

4 4K 1.77 2.06

5 5K 2.21 2.5

6 6K 2.65 2.94

7 7K 3.09 3.38

8 8K 3.54 3.83

9 9K 3.99 4.27

10 10K 4.42 4.71

Note: Actual voltages will vary slightly.

Length sensor zero point set

1. Fully retract the main boom

2. Open the cover of the cable reel

3. Turn the screw (reference the picture below, specifically the blue box) of the length

potentiometer with a small screwdriver counter-clockwise to a soft stop. The Length should be

the same as the basic boom’s length, if not perform an error check


22

4.2 ANGLE SENSING

The System measures the angle of the main boom of the machine with an angle sensor. The angle

sensor is contained within the cable reel, located on the left side of the main boom.

Block Diagram

The signal runs from the angle sensor to the CAN Bus converter board, both located in the cable reel.

From there, it travels as digital information on the CAN Bus to the CAN junction box, which acts as the

main CAN Bus running to the central unit.

Troubleshooting angle read-out:

CAN Bus electronics in cable reel

The angle sensor has a built in potentiometer that is driven by a pendulum. As the angle changes, the

pendulum will drive the potentiometer’s axle. The converter board supplies a constant voltage of 5V to

the angle sensor and in return monitors the voltage of the potentiometer.

The terminal used is X21. The angle sensor is connected as follows:

Terminal X21

1 + 5V

2 Signal

3 GND

CAN junction-box

HC4900

CU

Angle Sensor

CAN Bus Converter

X21 (angle)

X1 (CAN)


23

To troubleshoot the Angle channel, perform one of the following options:

Option 1:


24

Option 2:

Note: If you need to determine the angle for voltages other than shown above, do so by using the

following formula:

Angle (degrees) = 90 degrees – ((Voltage-1.875) * 72)


25

Setting the Angle zero point

1. Lower the main boom to zero degrees

2. Open the cable reel

3. Use an allen wrench (6mm) to loosen the screw shown in Box B below, then use an allen wrench

(10mm) to loosen the screw in Box A below, until you can turn the angle sensor.

4. Rotating the angle sensor counter clockwise will decrease the angle and rotating clockwise will

increase the angle. Adjust the displayed angle to be the same as the value measured by the angle

device. The error must not exceed ±0.2°

4.3 CAN CONVERSION BOARD

The signal runs from the length sensor and the angle sensor to the CANbus converter board, located in

the cable reel. From there, it travels as digital information on the CANbus.


A pressure transducer converts hydraulic pressure into a CAN signal. One (or two) pressure

transducer(s) is (are) connected to the piston side of the lift cylinder and one to the rod side.


26

4.5 LENGTH SENSOR (LG105/11.5)

This cable reel is used to measure inner-mid length, to finish boom control telescope out sequence.

This length sensor sends a current signal, from 4mA to 20mA. When the potentiometer is at the zero

position, it outputs 4mA. The fully out signal will depend on the cable on the reel.

4.6 A2B SWITCH

The HC4900 system uses a 4.7KΩ/open-circuit A2B switch. The central unit can check the resistance

value among 3.11KΩ to 8.1KΩ.

In working conditions, a weight hangs from the A2B switch. There is a 4.7KΩ resistant signal between

the plug’s pin2 and pin3, when the hook strikes the weight, A2B switch will open-circuit cutting off the

signal output.

In order to be sure that the A2B of the main and the jib hook can work at the same time, we must

serial-connect the two A2B’s, otherwise parallel connection of a piece of 20K resistance is necessary to

reduce the value range of resistance.

LED

X22 (2st length)

X1 (CAN)


27

When there is a problem with the A2B, perform the following steps:


28

4.7 WIND SPEED

The wind speed is a current signal; the effective measurement range is 0~40m/s.

4mA ------ 0m/s

20mA ------ 40m/s

The wind speed signal must also be converted by the CAN conversion board which is located inside

the LWG (large) cable reel (length/angle sensor). By monitoring the PDB variable the digital value will

be obtained.

Sampling Resistor of wind speed is 200Ω, so:

4mA ------ 0m/s ------ 0.8V

20mA ------ 40m/s ----- 4V

The standard sampling voltage is 5V, and 5V corresponds to digital 32768, so:

4mA (0.8/5)*32768=5242.88

20mA (4/5)*32768=26214.4

LED

X23 (wind speed)

X1 (CAN)


29

If the wind speed sensor spins normally, but the display does not vary, perform the following check

steps:


30

4.8 NO CONSOLE DISPLAY

If the console displays all of the information, but does not display a warning light when in dangerous

situations, replace the warning light board.

If the console has warning lights and back-lighting, but does not display any information on the LCD,

replace the LCD screen.

If there are no lights, warning lights or back-lighting, follow the steps below:


31

4.9 NO POWER IN CENTRAL UNIT

If there is no power supply to the sensors and display, check the central unit and the 19-pin cable which

is connected to the CU.


32

4.10 CAN BUS COMMUNICATION

The System measures the length of the main boom, the angle of the main boom, the pressure in the lift

cylinder, and the A2B status of the machine via a CAN Bus connection. Since this is a digital bus

connection, it is not possible to measure the signals on the bus with a multi-meter. Instead, the LMI

provides you with error codes that give you an indication of the bus status.

The error codes are one of the following:

E61 Error in the CAN Bus data transfer for all CAN units

E62 Error in the CAN Bus data transfer of the pressure transducer sensor unit

E63 Error in the CAN Bus pressure transducer sensor unit

E64 Error in the CAN Bus data transfer of the length/angle sensor unit

E94 Error in the CAN Bus data transfer between the CU and Console

Block Diagram

The block diagram illustrates that if the CU does not see a CAN Bus component, it will report an E61

Error. If it sees only the cable reel, it will report an E62 Error (the pressure transducer is missing). If it

sees only the pressure transducer, it will report an E64 Error (the cable reel is missing). An E63 Error

indicates that the pressure transducer is available, but there is an internal error.

HC4900

CU E64

Cable Reel

CAN Bus

Converter

E61E62

Pressure Transducer

E63

CAN junction box

IC4600 Console

E94


33

What to do when there are problems with one of these codes:

4.10.1 E61

A E61 Error indicates that there is an error in the CAN bus data transfer for all CAN units.

4.10.2 E62

An E62 Error indicates that there is an error in the can bus data transfer of the pressure transducer

sensor unit.

4.10.3 E63

A E63 Error indicates that the pressure transducer is reporting an internal problem. You cannot

troubleshoot any further, but the pressure transducer will need to be replaced.

4.10.4 E64

A E64 Error indicates that the CU is reporting no signal from the cable reel unit. Start by changing the

plug position of cable with the pressure transducer’s cable on the CAN junction box. If the E62 Error

occurs, replace the CAN junction box; if not, measure the cable from the CAN junction box to the cable

reel with an Ohm-meter. Check all pins of the CAN Bus cable for continuity and cross-check for short

circuit.

If the continuity check fails, the cable must be replaced. If the cable appears to be fine, check the

connector at the cable reel. You can verify that power is being supplied to the sensor by testing the

CAN connectors per the pin layout (see E61). Replace the connector if this check fails.

If the connector checks properly, the board in the cable reel might be defective.


LED

X21 (angle)

X20 (length)

X14 (A2B)

X1 (CAN)


34


X1 Pin CAN

1 CAN_SHLD

2 CAN +UB

3 CAN GND

4 CAN_H

5 CAN_L


35

4.10.5 E94

The HC4900’s CU sends a message per second to test the communication between the CU and

console. If the console cannot receive the message on time, it will show an E94 error, but be advised

that several problems cause the console not to receive the message on time.

Short circuit between CAN_H and CAN_L

CAN device’s communication disturb


36

5 SYSTEM COMMUNICATION CABLE

The communication cables of the system include:

• The communication cable of central unit-CAN junction box

• The communication cable of the console,

• The pressure transducer cable

• The cable of the length/angle sensor

The lead line color of the cable is uniform: brown, white, blue, black, gray. The soldering method

between lead line and the tie-in of the lead line is also uniform：

1. Brown Shield

2. White CAN_V+

3. Blue CAN_GND

4. Black CAN_H

5. Gray CAN_L

5.1 THE COMMUNICATION CABLE OF CONSOLE

One side of the cable is connected to the CAN junction box,

and the other side is connected to the console.

CAN Junction Box Terminal


37

5.2 THE PRESSURE TRANSDUCER CABLE

Pressure transducer terminal CAN junction box terminal

5.3 THE LENGTH/ANGLE SENSOR CABLE

Cable Reel Terminal CAN Junction box terminal

The pins soldered on the both terminals of length/angle cable are the same.


38

6 DRAWINGS

6.1 SYSTEM TOPOLOGY DIAGRAM


39

6.2 CENTRAL UNIT TO CRANE WIRING DIAGRAM

6.2.1 Earlier version


40

6.2.2 The latest version


41

6.3 CENTRAL UNIT TO CAN JUNCTION BOX WIRING DIAGRAM


42

6.4 CAN JUNCTION BOX TO OTHER SENSORS WIRING DIAGRAM


43

6.5 CABLE REEL WIRING DIAGRAM


44

7 SPARE PART LISTINGS

7.1 CENTRAL UNIT, HC4900 PART NO. 01490000100

NO. PART NO. QTY DESCRIPTION 1 01490050200 1 Central unit cover

2 04494600900 1 Central unit and CAN junction box back board

3 08221003300 1 RS232 socket (with wirings)

4 08221003600 1 Protection cover of RS232 socket

5 01490021000 1 19-pin socket (with wirings)

6 08221003100 1 5-pin CAN communication socket (with wirings)

7 08221003400 1 Breathing valve’s plug

8 08221003500 1 Breathing valve’s socket

9 08221002600 1 Mother board

10 08221002800 1 RTC module

11 01490020700 1 120Ω terminal resistance jumper

12 08221002700 1 Battery circuit board

1

2

34

5 6 7 8

9

10

11

14

13

12

15


45

13 01490020300 1 Battery cable

14 01490020400 1 CU ground cable

15 08062300300 1 Magnet

7.2 CAN JUNCTION BOX, PART NO. 04494600100

NO. PART NO. QTY DESCRIPTION 1 08221003800 1 Box cover

2 04494650500 1 Override switch indicating panel

3 08081001500 1 Override switch

4 04494650600 1 Junction box indicating panel

5 04494620100 1 Junction circuit-board

6 04494620500 1 5-pin override switch socket (with wirings)

2

1

3

4

5

6


46

7.3 IC4600 DISPLAY, PART NO. 02460000200

NO. PART NO. QTY DESCRIPTION 1 02360050600 1 IC4600 display’s front cover

2 02360050500 1 IC4600 panel switch (with pressable keys)

3 02360050700 1 Plexiglass display

4 02360120700 1 Display’s back housing

5 02360120800 1 RS232 communicate port (with wirings)

6 02460020700 1 Buzzer

7 02460020200 1 Display’s mother board

8 02460020400 1 Warning light circuit board

9 08061101100 1 LCD screen

2

1

3

4

5

6

7

8

9


47

7.4 LENGTH/ANGLE SENSOR, PART NO. 03520802000

NO. PART NO. QTY DESCRIPTION 1 08084003600 45m Length sensor cable

2 08221002900 1 CAN conversion board

3 04494620400 1 Connector 5-pole wirings

4 03520850300 1 Gear wheel (75)

5 03520820100 1 Length sensor potentiometer


7 08089000400 3 Electronic brush

8 03520820300 1 Slip ring assembly 3 conductor

9 03520850700 1 Gear wheel (25)

10 03510300600 1 Angle sensor

11 03520851800 2 Spring roll

2

1

3

4 5 8

102

5

7 6

7

9

8

11


48

7.5 LENGTH SENSOR (LG105), PART NO. 03510500300

NO. PART NO. QTY DESCRIPTION 1 03510520400 1 Length sensor

2 03510520500 1 Signal conversion board


1 2

3


49

7.6 SYSTEM CABLES

1

2

3

4


50

NO. PART NO. QTY DESCRIPTION 1 04494601000 1 Cable of the light on the tip of the boom

2 04494601600 1 Cable of override switch(from CAN junction box)

3 04494602100 1 Cable of power and I/O

4 04494601100 1 Cable of Length/Angle sensor(from CAN junction box)

5 04494600500 1 Cable from CU to CAN junction box

6 04494600600 1 or 2 Cable of pressure transducer(from CAN junction box)

7 04494600300 1 Cable of display (from CAN junction box to console)


NO. PART NO. QTY DESCRIPTION 1 08221003900 1 Piston side

2 08221003000 1 Rod side


51

8 BASIC ADJUSTMENT FOR SENSORS

Retract the boom to the shortest boom length and boom down until the boom angle is about 0°

measured by electronic level.

8.1 Set Zero Point of length sensor

Use a flat screwdriver to adjust the displayed boom length to the same as the actual boom length，

turning counter clockwise will decrease the length and turning clockwise will increase the length, the

error must not exceed ±0.1m.

8.2 Set Zero Point of Angle sensor

Use a wrench or socket (10mm) and a allen wrench (5mm) to adjust the position of the Angle sensor

(see position 1 on the picture below). Turning counter clockwise will decrease the angle and turning

clockwise will increase the angle. Adjust the displayed angle to the same value measured by the angle

device, and the error must not exceed ±0.2°.

Extend the boom to about 3m, measuring the distance between the rotary center of the hook center

(which is actually the actual radius) and compare it with the displayed radius. If the error is lower than

±0.1m, zero point of angle sensor must be corrected by online computer; if the error is above ±0.1m,

the boom must retract to about 0°, adjust installed position of angle device.


52

9 ERROR CODE

Error

Code Error Cause Elimination

E01

Boom below radius

range or angle range

exceeded

• Boom is below the minimum

radius or has exceeded the

maximum angle specified in the

respective load chart due to

raising the boom too high

• Lower the boom to a radius

or angle specified in the load

chart.

E02

Radius range exceeded

or fallen below angle

range

• Exceeded the maximum radius or

fallen below the minimum angle

specified in the respective load

chart due to lowering the boom

too low

• Raise the boom to a radius

or angle specified in the load

chart.

E03 Non-permitted slewing

zone (no load area)

• The load is outside of the

permitted slewing zone. • Slew to a permitted area

• A non existing operating mode

has been selected

• Set the correct operating

mode for the configuration in

question E04

Operating mode not

acknowledged or non

permitted slewing zone • The boom is in a non-permitted

slewing zone

• Slew the boom to a

permitted area.

• Boom has been extended either

too far or not far enough, e.g. if it

is prohibited to go beyond a

certain maximum boom length or

with load curves for jibs where

the main boom has to be

extended to a certain length

• Extend/retract boom to the

correct length E05 Prohibited length range

• Length sensor adjustment has

changed, e.g. the cable slid off

the length sensor reel.

• Retract boom. Check the

pre-stress of the cable reel

(cable must be taut). Open

the length sensor and

carefully turn the length

sensor pot counterclockwise

until the detent by means of

a screw driver


53

Error


• Clutch between length sensor pot

and drive is defective

• Replace the complete clutch

including drive wheel and

adjust length sensor pot as

described above

E06

Radius range exceeded

or fallen below angle

range with luffing jib

operation

• Maximum radius as specified in

the load chart has exceeded or

fallen below the minimum angle

due to lowering the luffing jib too

far

• Luff the jib to a radius or

angle specified in the load

chart.

• Length potentiometer is defective

• PDB variable for analog value not

supported

• Replace length

potentiometer

• Setup of correct PDB

variable for analog value in

DGA6.i.3

E11

Fallen below lower limit

value for measuring

channel "length main

boom" • Electronic component in the

measuring channel is defective • Replace sensor unit

• Pressure transducer is defective.


supported

• Replace pressure transducer



DGA6.i.3 E12

Fallen below the lower

limit value in the

measuring channel

"pressure piston side" • Electronic component in the

measuring channel is defective. • Replace sensor unit

E13


value in the measuring

channel "pressure rod

side"

• refer to E12 • refer to E12

E14


value in measuring

channel "force"

• Force transducer defective

• Electronic component in the

measuring channel is defective.

• Replace force transducer

• Replace sensor unit

• Angle potentiometer defective


supported

• Replace angle sensor



DGA6.i.3 E15


value in measuring

channel "angle main

boom" • Electronic component in the

measuring channel is defective. • Replace sensor unit


54

Error


E21

Upper limit value in

measuring channel

"main boom length" has

been exceeded.


E22


measuring channel

"pressure piston side"

has been exceeded


E23


measuring channel

"pressure rod side" has

been exceeded.


E24


measuring channel

"force" has been

exceeded.


E25


measuring channel

"main boom angle" has

been exceeded.


E31 Error in the system

program

• The system program file is

defective.

• Flash-EPROM is defective

• Upload valid system

software

• Replace central unit

E32 Error in the power

supply

• +UB System not present at the

system start

• +UB System not present at the

system finish

• Contact problems at +UB switch

off/on

• +UB System and +UB Power

must be wired separately:

+UB System connected

direct with the crane battery.

+UB Power for switch on/off

• +UB switch off/on again

E37 Error in the logical

program flow

• System program file is defective



software


E38

System program and

crane data file do not

match.

• The system program in the LMI

does not match the programming

in the crane data file


program file or the valid

crane data file

E39

System program and

load chart file do not

match

• The system program in the LMI

and the programming in the load

chart file do not match.


program file or the valid load

chart file


55

Error


E43 Error in the write/read

memory, (RAM)

• Write/read memory (RAM) or

central unit is defective. • Replace central unit

E47

Error in the monitored

write/ read memory.

The CRC verification of

the monitored write/read

memory provides an

incoherent result

• The CRC sign of the monitored

write/read memory is wrong

• The buffer battery is decharged

(< 2V at 1kOhm).

• Central unit is defective.

• Restart the LMI

• Replace buffer battery on the

central unit.


E51 Error in the crane data

file

• No valid data in the crane data

file.


• Upload valid crane data file


E52 Error in load chart file. • No valid data in the load chart file


• Upload valid load chart file


E56 Error in crane data file.

• No valid data in the crane data

file during calibration.


• Restore or upload valid

crane data file


E57 Error in serial crane

data file.

• Calibration data file does not

contain valid data.


• Upload calibration data file

by changing data (OM,

limits) and save


• CAN Bus cable between the

central unit and the sensor unit is

defective or not connected.

• Check the connection

between the central unit and

the sensor units

• CAN Bus port in the central unit is

defective • Replace the central unit

E61

Error in the CAN Bus

data transfer for all CAN

units

• Short circuit in a CAN Bus cable • Replace CAN Bus cable

• Cable between the central unit

and the sensor unit is defective.

• Check the cable to the

sensor unit

• CAN bus port in the central unit is

defective • Replace the central unit

• CAN bus port in the sensor unit is

defective • Replace the sensor unit

E62

Error in the CAN bus

data transfer of the

pressure transducer

sensor unit

• Sensor unit is defective • Replace the sensor unit

E63


pressure transducer

sensor unit

• The analog values of the sensor

unit are invalid • Replace the sensor unit


56

Error


E64


data transfer of the

length/angle sensor unit

• See E62 • See E62

E65 Error in the CAN bus

length/angle sensor unit • See E63 • See E63

E66

Error in the can bus data

transfer of the 2nd

length/angle sensor unit


E67

Error in the CAN Bus of

the 2nd length/angle

sensor unit


E84 Wrong rigging condition.

• The selected rigging condition is

not contained in the crane data

file.

• Select another rigging

condition

• Check the programming in

the crane data file.

E85 Error in the radius

determination

• The computed radius is too small

(negative deflection)

• Check the programming in

the crane data file.

E89 Operating mode

switchover with load.

• The operating mode on the

console has been switched over

with the boom loaded.

• Select operating mode

without load on the boom

E98 LMI watchdog activated • LMI processing time limit has

been exceeded

• Reset system

• Connect PC terminal and

watch error messages

EAB

Short circuit in the A2B

switch circuit (not with

radio A2B)

• Short circuit in the A2B switch

• Short circuit in the cable to the

A2B switch

• Replace A2B switch

• Replace cable to the A2B

switch

EAC

A2B switch circuit

disconnected

(not with radio A2B)

• Disconnected cable in the A2B

switch

• Disconnected cable to the A2B

switch

• Connect or replace cable in

the A2B switch

• Connect or replace cable to

the A2B switch

EAD No valid A2B switch

status

• Sensor wrong function

• CAN Bus delay

• Replace A2B switch

• Replace cable to the A2B

switch

EDB Datalogger setup error

• Setup of the datalogger is cleared

(ser. crane data file or battery

buffered RAM)

• Transfer data and setup

datalogger again


57

Error


EDC Datalogger watchdog

activated

• Datalogger processing time limit

exceeded

• Reset system

• Connect PC terminal and

watch error messages

EDD Battery empty • Battery check detected a low

voltage of the battery

• Change battery, after this

setup of RTC

EDE Record lost

• Not possible to save data

because other task saves data at

the same time

• Message disappears after a

few seconds

EDF Flash block full • Not possible to save any more

data


few seconds

EFD SLI Watchdog

extra time

• A function needs more than 0.5

sec, e.g. Flash PROM write


few seconds

10 TROUBLESHOOTING MOISTURE

The Hirschmann LMI contains electronic components in various locations, such as the central unit, sensors,

junction boxes, etc. These internal components cannot be designed to withstand exposure to moisture over

a long period of time. For this reason, the housings of the components are water protected according to IP

65. If you find water or moisture inside any of the housings, the source of the water ingress has to be

detected and corrected to ensure proper operation.

There are two major possibilities for the occurrence of excessive moisture inside an enclosure:

Water ingress

Condensation

The outline below gives instructions for detecting the cause for excessive moisture by using simple

troubleshooting methods to determine how to prevent the moisture ingress from happening again.

10.1 WATER INGRESS

There are different reasons for water ingress. It is possible to find the source of water ingress by going

through the following steps and ruling out one possibility after the other until the cause is identified:

1) Spray Cleaning

The enclosures used for the Hirschmann LMI system are water protected to IP 65. This means

protection against the environment, such as rain. However, using a spray cleaner at short distances

can force water through the gasket or strain reliefs. For this reason, avoid spraying any components

from short distances with spray cleaners. Convey this fact to any member of a maintenance crew.


58

2) Missing / Loose Screws

All screws have to be present and should be equally tight to ensure that the enclosure is protected

from. If there are screws missing, replace them. If there are not any screws missing, check the

tightness. If any screws are loose, loosen all of the screws and then re-tighten them equally.

3) Bent Lid

An enclosure will only seal correctly if the lid is not bent. To check this, loosen all screws of the lid,

take the lid off the box and visually inspect it for deflection. If the lid is bent or damaged, it needs to

be replaced. Try to determine what has caused the lid to be bent and eliminate the reason for that.

4) Defective Gasket

The gasket underneath the lid seals the unit. The gasket needs to be in good condition in order to

seal correctly. If the gasket is torn, brittle or severely bent, it needs to be replaced.

5) Loose Strain Reliefs

The strain relief allows cabling to enter the box without allowing water to enter it. The strain relief has

to be correctly tightened in order to do this. Check the tightness by taking the external cable in one

hand and carefully trying to turn it. If the internal wires turn with the outer cable, the strain relief is

loose. Order a new grommet (insert) through your SkyAzul representative and replace the

existing one with the new one. Tighten the strain relief correctly. Note: Whenever a strain relief is

opened, i.e. to replace a cable, a new grommet needs to be used. Never re-use a grommet or the

strain relief will not seal properly!

6) Water Entry Through External Cabling

Even with a tight strain relief, water may still enter the box through the inside of the cable. In this

case, you have to find out why and where water enters the cable. Look for damage to the cable itself

and inspect the opposite side of the cable. For example, if the cable comes from a connector that is

full of water, the water will run through the inside of the cable and fill up the central unit, too.

10.2 CONDENSATION

In a climate with high humidity and rapidly changing temperatures, condensation can occur inside any

enclosure. Typically, the larger the volume of the box, the more likely condensation will occur. In this

case, water drops build up on the inner components when humid air is trapped inside the box. With

condensation, water tightness is not a problem – the box is sealed, which is what prevents the trapped

air from exiting the box. There are two ways to handle condensation:

If the volume is very small, a desiccant bag might be able to soak up the air’s humidity.

If the effect is more severe, the only way to get rid of this effect is to give the box the ability to

breathe without sacrificing its water tightness. Contact a SkyAzul representative for breathing

elements that can be added to the box and will help to reduce the effects of humid climates.





SkyAzúl, Inc. 16 Walnut Street Middletown, MD 21769 Phone 301-371-6126 Fax 301-371-0029 [email protected] www.skyazul.com

Date post:	21-May-2018
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